[cling]$ int square(int u) { return u*u; }
[cling]$ #include<iostream>
[cling]$ using namespace std;
[cling]$ cout << square(42) << "!" << endl;
1764!
[cling]$
[cling]$ int square(int u) { return u*u; }
[cling]$ #include<iostream>
[cling]$ using namespace std;
[cling]$ cout << square(42) << "!" << endl;
1764!
[cling]$
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